/* 
 * Copyright (c) 2011-, Agilord Kft. - All Rights Reserved.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at 
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.agilord.dragonflyp4;

import java.io.File;
import java.util.ArrayList;
import java.util.LinkedHashSet;

import java.util.Set;

/**
 * Some configuration helper utility
 * 
 * @author Istvan Soos
 * @since 1.0
 */
public class ConfigurationUtils {

	public static String[] parseCommas(String value) {
		Set<String> set = new LinkedHashSet<String>();
		if (value != null) {
			for (String s : value.split("\\,")) {
				s = s.trim();
				if (s.length() == 0)
					continue;
				set.add(s);
			}
		}
		return new ArrayList<String>(set).toArray(new String[set.size()]);
	}

	public static String selectFirstFile(String value) {
		return selectFirstFile(parseCommas(value));
	}

	public static String selectFirstFile(String[] values) {
		if (values == null)
			return null;
		for (String v : values) {
			if (new File(v).isFile())
				return v;
		}
		return null;
	}
}
